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Engine coolant is a "lifetime" affair?
Hey guys, I intended to drain/flush/refill our X6 with fresh coolant. While looking for the coolant capacity on Google, I ran across a statement that the coolant is good for the life of the vehicle. I've got 45k miles on ours, is it even worth replacing it?
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2007 FJ Cruiser
2012 X6 35i
2013 ML350 BT
2019 4Runner
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